nice bug cost me quest components :(

[Angruin]

rozen Cavern
Obvious exits: south, west
[HP=335/MA=131]:s
[HP=328/MA=142]:hid gnom
Frozen Cavern
Obvious exits: north, south
You hid gnomish fish-helm.
[HP=328/MA=142]:s
i
Frozen Cavern
Obvious exits: north, south
iron hammer, gold signet ring, copper amulet, Storm Spirit, Heartstone, Eternal
Fire, topaz emblem, Ice Tear
You have the following keys: black star key, white key.
Wealth: 3706800 copper farthings
Encumbrance: 3966/6768 - Medium [58%]
[HP=328/MA=142]:s
You have drowned...
You drop to the ground!
You have been killed!
Angruin just destroyed Angruin!
[HP=-7386/MA=142]:You may not do that while you are mortally wounded!
[HP=-7386/MA=142]:
Frozen Cavern
Obvious exits: north, south
[HP=-7386/MA=142]:

[Gardner Denver]

I'm going to guess that you ran through the last room of the frozen lake so fast that the stop drowning spell did not hit you.